3D Bunny Dash is a rhythm-jumping game about a pink bunny, inspired by Geometry Dash — made by a dad and his five-year-old son as a way to learn math and programming together. Spikes kill you. Cubes are platforms: land on top, never touch the sides. Reach the golden gate for fireworks. Nine levels, three bosses: the Rotten Tomato, the Cursed Thorn, and BAD BAT.

The source code doubles as a beginner lesson book: every system is commented in plain language explaining the math that drives it — gravity, sine waves, distance checks, remainders and pseudo-randomness. It includes a built-in level editor in the spirit of Geometry Dash and Mario Maker (saving levels needs the desktop version). Free software under the GPL, on GitHub.